Vitamin K

fat-soluble vitamins found in foods and marketed as dietary supplements

Phytomenadione, also known as vitamin K1, phylloquinone, or phytonadione, is a vitamin found in food and used as a dietary supplement. It is on the World Health Organization's List of Essential Medicines.

Menadione is a natural organic compound with the formula C6H4(CO)2C2H(CH3). It is an analog of 1,4-naphthoquinone with a methyl group in the 2-position. It is sometimes called vitamin K3. Use is allowed as a nutritional supplement in animal feed because of its vitamin K activity.

group of vitamins and bacterial metabolites

Menadiol is an organic compound with the formula C6H4(COH)2(CH)(CH3). It is formally the p-hydroquinone derivative of 2-methylnaphthalene. The name vitamin K4 can refer to: specifically this compound, its various esters, e.g. menadiol diacetate (acetomenaphthone), menadiol dibutyrate, menadiol dimalonate, or its various salts, like menadiol sodium diphosphate (Kappadione) menadiol sodium disulfate.

Menatetrenone (INN), also known as menaquinone-4 (MK-4), is one of the nine forms of vitamin K2.

4-amino-3-methyl-1-naphthol is a synthetic menadione analog. It is also known as vitamin K7, and was named as such in 1950 when it was recognized as a compound with vitamin K activity.